NASA’s Solar Dynamics Observatory spotted a gigantic, dark hole that’s hundreds of times larger than the Earth. It’s a phenomenon called a “Coronal Hole,” and spans about 250,000 miles at its widest point, according to associate director for science for the heliophysics division at the space agency’s Goddard facility, Dr. C Alex Young. The total surface area of this hole is 410 times larger than out planet.
Coronal holes were first observed by NASA astronauts in the 1970s. They’re not actually holes, but rather cooler regions where the sun’s magnetic field is able to reach out into space...
